Canada’s Chief Public Health Officer is now advising Canadians towear “non-medical” masksto reduce the risk that asymptomatic people will spread SARS-CoV-2. The change in advice comes amid increasing evidence of transmission by people unaware they have the virus, said Dr. Theresa Tam. Physical distancing and handwashing are still critical to reduce transmission, she cautioned.

New researchpublished inNatureindicated that surgical masks may help to reduce emission of coronavirus into the environment via respiratory droplets and aerosols. This notice and picture below appears on the April 6, 2020 Canadian Medical Association Journal (CMAJ) website: cmajnews.com/2020/04/06/coronavirus-1095847/